Problem Display
PID: 70324 (7b/4pK1p/1pQ1P2B/2n1kn1R/1r1p2p1/4p3/3P1PPp/5b1q w - - 0 1)

Kopnin, Aleksey Grigorevich

1st Place, USSR Championship, 1972

7b/4pK1p/1pQ1P2B/2n1kn1R/1r1p2p1/4p3/3P1PPp/5b1q

#4

8 + 14


3753 FIDE Album (1971-1973) 1978

SOLUTION


  • SOUND
  • Keys
    • 1.d3!
      • threat
        • 2.Qc7+
          • 2...Kd5
            • 3.Rxf5+
              • 3...Be5
                • 4.Rxe5#
      • 1...Bxd3
        • 2.f4+
          • 2...gxf4 ep
            • 3.g3
              • threat
                • 4.Bf4#
              • 3...Sxe6
                • 4.Qxe6#
      • 1...Sxd3
        • 2.f3
          • threat
            • 3.Rxf5+
              • 3...Kxf5
                • 4.Qe4#
            • 3.fxg4
              • threat
                • 4.Rxf5#
          • 2...gxf3
            • 3.g4
              • threat
                • 4.Rxf5#
      • 1...Bf6
        • 2.Qc7+
          • 2...Kd5
            • 3.Rxf5+
              • 3...Be5
                • 4.Rxe5#
      • 1...Bg7
        • 2.Bxg7+
          • 2...Kf4
            • 3.g3+
              • 3...Sxg3
                • 4.Be5#
                • 4.Bh6#
        • 2.Qc7+
          • 2...Kd5
            • 3.Rxf5+
              • 3...Be5
                • 4.Rxe5#
        • 2.f4+
          • 2...gxf4 ep
            • 3.Bxg7+
              • 3...Kf4
                • 4.Qxf3#
        • 2.f3
          • threat
            • 3.f4#
          • 2...Bxh6
            • 3.Qc7+
              • 3...Kd5
                • 4.Rxf5#
          • 2...Sxd3
            • 3.Rxf5+
              • 3...Kxf5
                • 4.Qe4#
            • 3.f4+
              • 3...Sxf4
                • 4.Bxg7#
            • 3.fxg4
              • threat
                • 4.Rxf5#
          • 2...gxf3
            • 3.Bxg7+
              • 3...Kf4
                • 4.Qxf3#

FEATURES


NOT CLASSIFIED


Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).